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In daily life, people rely more and more serious dependence on electronic equipment, electronic technology upgrading, but also means that people have high hopes for the development of power technology, the following to introduce the main classification of power management technology.
Power management semiconductors from the included devices, clearly stressed the power management IC (power management IC, referred to as the power management chip) the location and role. Power management semiconductors consists of two parts, namely power management IC and power management discrete semiconductor devices.
Power management ICs include many categories, roughly divided into voltage adjustment and interface circuit two aspects. The voltage wappler includes a linear low dropout regulator (LOD), as well as positive and negative output series circuits, and a pulse-less modulation (PWM) type switching circuit. Due to technological progress, the physical size of the digital circuit in the integrated circuit chip is getting smaller and smaller, and thus the working power source is developing to a low voltage, and a series of new voltage regulators come into being. Power management interface circuit mainly has interface driver, motor driver, power field effect transistor (MOSFET) driver and high voltage / high current display driver and so on.
Power management discrete semiconductor devices include some traditional power semiconductor devices, it can be divided into two categories, one class includes rectifiers and thyristors; the other is a transistor type, including power bipolar transistors, containing MOS structure Power field effect transistor (MOSFET) and insulated gate bipolar transistor (IGBT) and so on.
To some extent, it is because of the large number of power management IC development, power semiconductor was renamed the power management semiconductor. It is also because so many integrated circuits (ICs) into the power sector, people are more to power management to call the current stage of power technology.
The main part of the power management semiconductors is the power management IC, which can be roughly summarized as follows.
1, AC / DC modulation IC. Contains low voltage control circuit and high voltage switching transistor.
2, DC / DC modulation IC. Including step-up / down regulator, and charge pump.
3, power factor control PFC pre-modulation IC. A power input circuit with a power factor correction function is provided.
4, pulse modulation or pulse width modulation PWM / PFM control IC. For a pulse frequency modulation and / or a pulse width modulation controller for driving an external switch.
5, linear modulation IC (such as linear low voltage drop regulator LDO, etc.). Including forward and negative regulators, and low dropout LDO modulation tubes.
6, battery charging and management IC. Including battery charging, protection and power display IC, as well as battery data communication "smart" battery IC.
7, hot card control IC (from the work system to remove or remove the impact of another interface).
8, MOSFET or IGBT switching function ic.
In these power management ICs, voltage regulation ICs are the fastest growing and most productive components. A variety of power management ICs are basically associated with a number of related applications, so for different applications, you can also list more types of devices.
Power management technology trends are high performance, low power consumption, and intelligent.
Improve performance involves two different aspects: on the one hand you want to maintain the overall efficiency of energy conversion, but also want to reduce the size of the device; the other is to protect the size of the same, a substantial increase in performance.
In AC / DC (AC / DC) transformations, low on-state resistance meets the needs of more efficient adapters and power supplies in computer and telecom applications. In the power circuit design, the general standby power consumption has been reduced to below 1W, and power efficiency can be increased to more than 90%. To further reduce the existing standby power consumption, you need to have a new IC manufacturing process technology and breakthroughs in low-power circuit design.
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